Sanding device



Dec. 15, 1936. E. FALK SANDING DEVICE 3 Sheets-Sheet 1 Filed Nov. 15, 1934 Attorney Dec. 15, 1936. E K 2,064,250

SANDING DEVICE Filed Nov. 15, 1934 s Sheets-S heet 2 I nventm Attomey Dec. 15, 1936. A 2,064,250

SANDING DEVICE Filed NOV. 15, 1954 3 Sheets-Sheet 5 I nventor Patented Dec. 15, 1936 IUNITEDK STATES PATENTIOFFICEI Elias Falk, Hartford,- Conn.

Application November 15, 1934, Serial No. 753,200

2 Claims.

This invention relates to improvements in sanding devices of the type used on automotive vehicles for the purpose of delivering sand to the ground on the roadway in front of the rear wheels of the vehicle to prevent skidding of the car. The invention together with its objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein:

Figure l is a side elevational view of an automotive vehicle illustrating the application of the invention.

Figure 2 is a front elevational view of the device certain parts being broken away and shown in section.

Figure 3 is an end elevational view certain parts being broken away and shown in section.

Figure 4 is a top plan view'with certain parts shown in horizontal section.

Figure 5 is a fragmentary detailed view of the valve controlled outlet means, with the valve in open position.

Figure 6 is a fragmentary top plan view of a control switch.

Figure 7 is a fragmentary elevational view showing an indicator for the control valve forming part. of the invention.

Referring to'the drawings by reference numerals it will be seen that the sanding device comprises a casing or receptacle It for the sand and the same is provided at the rear thereof with brackets II whereby the container I0 may be readily mounted and secured to the dashboard I2 as suggested in Figure 1 wherein an automobile indicated generally by the reference numeral I3 is illustrated for the purpose of showing an application of the invention.

In accordance with the present invention the receptacle ID in the bottom thereof is provided with a well I4 the bottom of which is lined with rubber or other suitable material I5 to prevent leakage of sand.

Extending through the bottom of the well I4 are outlet tubes I6 the inner end portions of which are provided with lateral openings I1. Connected with the inner end portions of the outlet tubes I6 in line with the openings I! are air tubes I8 that lead from the outlet side of a blower I9 suitably mounted by brackets 20 on one end of a cover 2| provided for the top of the casing or receptacle I0.

Connected with the outer ends of the outlet tubes I6 are conduit tubes 22 that extend rearwardly and terminate in nozzles 22a. suitably located with respect to the rear wheels I3a of the automobile I3 so as to discharge sand onto the ground forwardly of the wheels I3a with the result that the tires of thewheels will obtain a firm grip on the roadway and prevent material skidding of the vehicle.

The inner endsof the outlet tubes I6 are open for the entrance of sand and are controlled by a valve plate 23 provided on one end of a stem or shaft 24 the lower end of which is journaled' in a suitable bearing structure provided in the well I4 and indicated by the reference numeral 25.

A skeleton frame structure 26 rises from the bottom of the well I4 and the shaft 24 is disposed vertically within the confines of this frame structure. The upper end of the frame. structure projects beyond the top of casing I0 and is accommodated within a hood structure 2 .Ia secured to the lid 2I as shown in Figure 2.

The upper end of the valve rod 24 is connected through the medium of suitable gears 21 with a shaft 28 arranged in the hood structure 21a and supported by suitable bearings 29 mounted on'the upper end of the skeleton framestructure 26. An operating rod 30 extends through the instrumentboard I2b of'the automobile and at one end'has a universal connection 3| with the shaft 28. 7 At its other end the shaft 30 is provided with a suitable handle 32 located within convenient reach of the operator or other occupants of the automobile as clearly shown in Figure 1. one direction the valve shaft 24 will be rotated in one direction against the action of spring 33 to move the valve 23 from the closed position shown in Figure 2 to the open position shown in Figure 5' so that sand may be sucked from the casing HI through the outlet tubes I6 and under pressure be forced through the conduits 22 to discharge onto the road forwardly of the vehicle wheels I3a as suggested in Figure 1.

The blower I9 is driven by an electric motor 33, and also arranged in circuit with the motor 33 is a signal lamp 34 that is mounted on the instrument board so as to be always in view of the operator. For controlling the motor and lamp circuit there is provided a control switch consisting of a pair of spaced apart spring contact members 35; 36 mounted on the upper end of the skeleton frame structure 26 and supported in proper position through the medium. of bracket means 31 of suitable insulation material. Secured to, and insulated from the shaft 28 is a bridge contact member 33 that, when the shaft 28 is rotated to open the valve 23, is moved Obviously by rotating handle 32 in V into engagement with the contacts 35, 36 for completing the circuit through the motor 33 and the lamp 34 for setting the blower I9 in operation. In this connection it will be understood that when the lamp is lit the operator will know that the sanding device is operating, and when the switch is closed and the lamp 34 fails to light the operator will likewise know that the sanding apparatus is not operating.

It is thought that the operation and utility of the device is clear from the foregoing. The operation may be briefly set out as follows. When it is desired to discharge sand onto the road in front of the vehicle wheels the operator swings the handle 32 in, the proper direction thus opening the valve 23. Incidental to an opening of the valve 23 the circuit to the motor 33 is closed as just described so that the blower I9 is set into operation. With the blower in operation, air under pressure passes through the tubes 18, the outlet tubes [6 and the conduit tubes 22. As this air enters the tubes I6 through the openings I! a suction is created across the inner ends of the tubes I6 so that sand within the casing or box IE] will be drawn into the tubes l6 through the upper ends thereof and under pressure of the air forced through the tubes 22 to discharge from the nozzles 22a. After the desired or required amount of sand has been used, the operator releases the handle 32 and shaft 24 under action of spring 33 will rotate in a reverse direction to close the valve 23 and this movement of the shaft 24 is transmitted to the shaft 28 so that the latter is 1'0- tated in a corresponding direction to move the bridge contact 38 to the position shown in Figure 6 and out of engagement with the contacts 35 and 36 thus interrupting the circuit to the motor 33 and the lamp 34.

In Figure 4 a source of electric energy is indicated at 19. One side of said source of energy is connected electrically by a conductor 86 with a motor 33, and said motor 33, in turn, is electrically connected to a conductor 8| with a terminal 36, Figures 4 and 6. By comparison of Figures 4 and 6 it will also be noted that a terminal 35 is electrically connected by a conductor 82 with a lamp 34, and that said lamp 34 is electrically connected by a. conductor 83 with the other side of the source of energy 19. From this it follows that when the terminals 35 and 36 are electrically connected by the interposition therebetween of the contact member 38, both the motor 33 and the lamp 34 will be energized, the lamp 34 being in the same circuit as the motor. It will also be understood that when the contact member 38 is moved out of engagement with the terminals 35 and 36 both the motor 33 and the lamp 34 will be deenergized.

For use in conjunction with the valve 25 there is provided an indicator in the form of a. dial plate 39 secured to the instrument board I21: and provided as indicated generally at 40 to cooperate with a pointer 4| provided on the operating rod 36 to indicate when the valve is in fully opened and closed position or in a. partially open, position, such as for example, one-half or one-quarter open position. Thus, the position of the valve may be quickly and easily regulated by the, operator to control the amount of sand to be used.

Having thus described the invention, what is claimed as new is:

1. The combination with a motor vehicle of a sand blower comprising a sand receptacle, a pair of outlet tubes extending through the bottom of the receptacle and open at their respective inner and outer ends, a blower, conduit tubes connecting the blower with the outlet tubes atcone side of the outlet tubes, sand conduits leading from the outer ends of the outlet tubes to terminate adjacent the wheels of the automobile, a single valve plate pivotally mounted intermediate its ends in said receptacle and having its terminals normally disposed on the inner ends of said outlet tubes, a motor for driving said blower an electric circuit for said motor, a signal element arranged in said circuit, means for rotating the valve plate, and a switch controlled by said valve plate rotating means for closing the circuit to the motor and through the signal element incidental to a movement of the valve plate to open position from across the inner ends of the outlet tubes.

2. The combination witha motor vehicle, of a sand blower comprising a sand receptacle, blower means connected with the receptacle for drawing sand by suction from the receptacle, and including a pair of conduit tubes for discharging the sand adjacent the wheels of the automobile, a motor for said blower means, an electric circuit for said motor, valve means for controlling the passage of sand through said conduit tubes, means for operating the valve including indicator means for indicating the position of the valve, and a switch arranged in circuit with said motor and controlled by the valve-operating means for controlling the circuit to the motor, and a signal element arranged in circuit with said motor and switch for indicating the operative or inoperative condition of the sand blower.

ELIAS FALK. 

